They evolved through mutations and natural selection, of course.
First change:
1. The "primordial soup" became less "soupy" and more "watery" as protobionts got better at incorporating the organic materials into their structures.
Later changes:
2. With oxygenic photosynthesis, oxygen combined with dissolved iron in the oceans. The oxidized material (mostly hematite and magnetite) precipitated out and are found as "banded iron formations" today.
3. With oxygenic photosynthesis, eventually enough oxygen gas was released that it significantly changed the overall makeup of the atmosphere. With free oxygen, an "ozone layer" formed, helping to protect the earth's surface from solar ultraviolet.
Nitrogen has made up the largest portion of Earth's atmosphere for most of Earth's history. It currently makes up about 78% of the atmosphere.
The measurement of Earth's history divided into time periods is called the geological time scale. It is divided into eons, eras, periods, epochs, and ages, with each unit representing a significant change in Earth's geological and biological history.
The record of Earth's history is called the geological timescale. It is a classification system that organizes Earth's history into different time intervals based on significant geological events and changes in life forms.
The largest era in Earth's history is the Precambrian, which spans from the formation of Earth around 4.6 billion years ago to the beginning of the Phanerozoic eon around 541 million years ago. The Precambrian makes up about 88% of Earth's history.
The collection of fossils studied by scientists to gather information about the history of life on earth and past environments is called the fossil record. This record includes information about the evolution of organisms, past climates, and ancient ecosystems, providing valuable insights into the earth's history and the processes that have shaped life over time.
The origin of photosynthetic prokaryotes caused an aerobic atmosphere during the history of the earth.
organisms in the archaea kingdom Prokaryotes
In cold and dry environments on Earth, such as polar regions or high-altitude deserts, scientists are likely to find extremophilic prokaryotes, particularly psychrophiles and xerophiles. Psychrophiles thrive at low temperatures and may possess unique adaptations that allow them to metabolize and grow in freezing conditions. Xerophiles, on the other hand, are adapted to survive in extremely dry environments, utilizing specialized mechanisms to retain water and withstand desiccation. These prokaryotes could provide insights into potential life forms that might exist in similar harsh conditions on Mars.
Nitrogen has made up the largest portion of Earth's atmosphere for most of Earth's history. It currently makes up about 78% of the atmosphere.
A bit of history how did Columbus described earths shape?
Prokaryotes reproduce using asexual reproduction. All prokaryotes have cytoskeletons but lack a membrane around their nucleus. The 4 most common shapes for a prokaryotes cell is cocci, bacilli, spirochete, and vibrio.
Yes, prokaryotes are generally considered to be older than eukaryotes in terms of evolutionary history. Prokaryotes are believed to have appeared on Earth around 3.5 billion years ago, while eukaryotes are thought to have evolved from prokaryotic ancestors around 1.5 billion years ago.
Prokaryotes evolved before eukaryotes because they are simpler in structure and function, making them better suited for surviving in early Earth's harsh conditions. Their ability to adapt quickly to changing environments allowed them to thrive and evolve first.
The measurement of Earth's history divided into time periods is called the geological time scale. It is divided into eons, eras, periods, epochs, and ages, with each unit representing a significant change in Earth's geological and biological history.
Archaea are unicellular prokaryotes that are adapted to living in a remarkable number of places. They are extremophiles, thriving in extreme environments such as hot springs, deep-sea hydrothermal vents, and even highly acidic or salty environments. Their diversity and adaptability make them one of the most widespread groups of organisms on Earth.
by studying the earth gravity by studying eartquakes
by studying the earth gravity by studying eartquakes